Lifting-jack or elevator.



No. 698,896. I Patented Apr. 29, I902.

c. BEIEBSTORF.

LIFTING JACK 0R ELEVATOR.

(Application filed Nov. 16. 1901.)

(No Model.) 2 Sheets-Sheet I.

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' Patented Apr. 29, I902.

c. BEIEBSTORF. LIFTING JACK on euavmun.

Application filed Nov. 1a. 190:.)

2 Sheets-Sheet 2.

i (No Model.)

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Name terns CHARLES BEIERSTORF, on ST. LoUIS, MISSOURI.

LIFTING=JACK OR ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 698,896, dated April29, 1902.

' Application filed November 16, 1901. Serial No. 82,530. (No model.)

To all whom, it may concern:

Be it known that I, CHARLES BEIERSTORF, of the city of St. Louis, Stateof Missouri, have invented certain new and useful Improvements inLifting-Jacks or Elevators, of which the following is a full, clear, andexact description, reference being had to the accom ,upwardly from thebase, a platform mounted to move up and down in said frame, a gearrackcarried by said platform, a ratchet-rack carried by said platform, ashaft mounted in said frame, a gear on said shaft for operating saidrack, a ratchet and lever for operatin g said gear, apawl to engage saidratchetrack and support the platform, and means of releasing said pawl.

Figure 1 is a side elevation of the complete invention. Fig. 2 is a planview of same. Fig. 3 is a sectional View showing the arrangement of thedifferent parts. Fig. 4is an enlarged section of the part 'of theoperating mechanism whereby the objects arelifted,

In constructing the device as shown I- provide two side frames 1,mounted vertically upon a wheel-supported frame 2, so that the devicemay be readily moved from place to place. The side frames 1 are spaced asuitable distance apart, and each is provided with a vertical slot 3.Said frames may be braced or otherwise made rigid in their uprightposition, so that they cannot easily be overthrown when heavy objectsare raised.

Between the side frames 1 is mounted a vertical member 4,which has agear-rack 5 formed on one side, and on each side of the said rack areformed ratchet-teeth 6. Pins 7 are formed rigid with the lower end ofmember 4 and operate within the slots 3, and thereby'form guides orretainers for holding the said member 4 in position.

Between the side frames 1 a roller 8 is supported by the upper ends ofthe frames 1 and bears against the flat surface of the member- 4-toprevent it from becoming dislocated from between the side frames.

0 indicates a shaft, which is supported in bearings near the upper endsof the side frames 1, and rigidly mounted upon the said shaft is agear-wheel, which is .in constant mesh with the rack 5, and may beclearly seen in Fig, 3.

ll'indicates a ring, which is supported near one endof the shaft 9 bymeans of a seriesof arms 12, and on the inner side of the said ring 11is formed a number of ratchet-teeth 13. A lever 14, provided on itsinner end with a bracket 15, is pivotally supported on the end of theshaft 9 adjacent to the ring 11,

and the said bracket 15 is within the said ring 11, as 'shown in Fi 4. Agravity-pawl16 is- .to by means of the connection 13, so that the pawlmay be raised out of engagement with the ratchet-teeth 13 to permit theshaft 9 to turn, which will allow the rack 5, which had been raised, tolower to" a normal position. 19indicates a bifurcated lever, which issupported by the said frames '1 adjacent to the ratchet-teeth 6, so thatthe inner ends of the said lever may ride upon the said teeth 6, andthereby uphold these parts after they have been raised by the operationof the lever 14. The said lever 19 may be moved out of engagement withthe ratchet-teeth by lowering its outer end, which will raise the innerend away from the said ratchet-teeth 6, and thereby permit the elevatedparts to sink to their normal position.

A frame 20 is rigidly connected to the lower end of the member 4 and isadapted to support the object which is to be elevated or raised. Aseries of rollers 21 is carried by the said frame 20, so that any objectmay be readily placed thereon.

In operation the object which is to be raised is placed upon the frame20 and the rollers 21 While they are in their normal position. The lever14 is then operated, the pawl 16 being in an engagement with theratchet-teeth 13, as above described. This will rotate the shaft 9andthe gear-wheel l0, and the gear-wheel being in constant mesh with therack 5 the latter will be raised, together with the frame 20 and therollers 21 connected thereto, carrying the object along with them. Theinner ends of the forks of the lever 19 normally rest upon theratchet-teeth 6, so that the lever 14 may be operated a number of timesto raise movable parts to their required height, the said lever 19holding the parts elevated until the said lever 14 can be brought backfor another operation. After the object has been raised,

as described, and has been moved from the.

frame 20 and the rollers 21 these parts may be restored to their normalposition by raising the lever 19 from the teeth 6 and raising the pawl16 out of engagement with the ratchet teeth 13, which will permit theparts to be drawn back by gravity to their normal posinon.

Suitable bases or other known devices may be made use of, if foundnecessary, to strengthen and support the frame 20 in its horizontalposition.

I claim- 1. A lifting-truck comprising a suitable base mounted onwheels; a frame extending upwardly from the base; a platform mounted tomove up and down in said frame; a gearrack carried by said platform formoving the same; a ratchet-rack carried by said platform for supportingthe same; a shaft mounted in said frame; a gear on said shaft andoperatin g said rack; a ratchet and lever for operating said gear; and apawl to engage said ratchet-rack and hold it from sliding downwardly,substantially as specified.

2. A lifting-truck comprising a suitable base; a frame extendingupwardly from the base; a platform to move up and down in said frame;rollers forming the floor of said platform; a gear-rack carried by saidplatform; a ratchet-rack carried by said platform; a shaft mounted insaid frame; a gear on said shaft for operating said rack; a ratchet andlever for operating said gear; and a pawl engaging said ratchet-raek tohold it from sliding downwardly, substantially as specified.

3. A lifting-truck comprising a suitable base; a frame extendingupwardly from the base; a platform mounted to move up and down in saidframe; a gear-rack carried by said platform; a ratchet-rack carried bysaid platform; a shaft mounted in said frame; a

gear on said shaft for operating said rack; a ratchet and lever foroperating said gear; a pawl to engage said ratchet-rack and hold therack from sliding downwardly; and means of releasing said pawl asrequired to lower the platform, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES BEIERSTORF. Witnesses:

ALFRED A. EIoKs, JOHN D. RIPPEY.

